According to multiple reports, at least 12 people were killed and about 50 others injured after the gunman released what witnesses described as a smoke bomb and then began firing at moviegoers inside the theater.

The suspect, who was heavily-armed and wearing a bulletproof vest, was apprehended by police in the theater's parking lot, according to Aurora Police Chief Dan Oates.

Warner Brothers has canceled TDKR's planned Paris premiere tonight and issued a statement on the tragedy. "Warner Bros. and the filmmakers are deeply saddened to learn about this shocking incident. We extend our sincere sympathies to the families and loved ones of the victims at this tragic time."

Here is a compilation of the latest celebrity reactions:

President Obama: "Michelle and I are shocked and saddened by the horrific and tragic shooting in Colorado. Federal and local law enforcement are still responding, and my Administration will do everything that we can to support the people of Aurora in this extraordinarily difficult time. We are committed to bringing whoever was responsible to justice, ensuring the safety of our people, and caring for those who have been wounded. As we do when confronted by moments of darkness and challenge, we must now come together as one American family. All of us must have the people of Aurora in our thoughts and prayers as they confront the loss of family, friends, and neighbors, and we must stand together with them in the challenging hours and days to come."

Mitt Romney: "Ann and I are deeply saddened by the news of the senseless violence that took the lives of 15 people in Colorado and injured dozens more. We are praying for the families and loved ones of the victims during this time of deep shock and immense grief. We expect that the person responsible for this terrible crime will be quickly brought to justice."

Chris Evans: "What the hell is happening?? my heart is completely shattered. all of my thoughts and prayers are with the people of Aurora."

Whoopi Goldberg: "We Gotta stop looking for reasons here there is no reason only irrational acts by irrational people. All we can do is try 2 bring comfort."

Olivia Munn: "My sincerest condolences to the victims and families in Colorado. So sad, so mindless."

Kaley Cuoco: "Colorado omg.. Praying for the families...this is sick."

Haylie Duff: "Listening to the radio coverage re: the Colorado movie theatre shooting. So devastating for the families."

Cheryl Burke: "My heart goes out to all the families and victims in Aurora, Colorado. This is insane!!"

Ashley Tisdale: "Saying a prayer for #Aurora. So sad to hear the news, u r all in my thoughts."

Matthew Morrison: "My thoughts and prayers are with the victims and their families in Aurora, Colorado today."

Julianne Hough: "My love & prayers are with all the families that have been affected by the horrible, unspeakable torment from last nights shooting! My heart is so heavy! Don't take for granted the air we breath the people that touch us and the people we touch!"

Jessica Simpson: "Praying for the victims and families of those involved in the shooting in Colorado. My heart is broken. So awful. God Bless..."

Giuliana Rancic: "Chills & tears watching coverage of #Aurora shootings. Praying for the innocent lives lost & those in hospital. What a tragedy."

J.R. Martinez: "Waking up to the #tragic news of the # #theatershooting in #aurora CO. Sickening to say the least. No excuses or trial~max penalty for him."

Kevin Smith: "Heartbreaking to read witnesses in Aurora say they first thought the shooting and gas was an elaborate, in-theater extension of the movie."

Snooki: "My prayers go out to the victims and families of the Colorado theater shooting."

Mark Ballas: "Just heard about the Denver shootings.. My prayers go out to all the families..."

Piers Morgan: "Horrendous details from this Colorado cinema shooting. America has got to do something about its gun laws. Now is the time."

Ellen DeGeneres: "The news from Denver is just devastating. My heart is with the families affected by this senseless tragedy."

Kristin Cavallari: "Wow..waking up to news about the shooting in Aurora, CO. My heart goes out to all the families. So sad."

Matthew Morrison: "My thoughts and prayers are with the victims and their families in Aurora, Colorado today."

Bret Michaels: "Our thoughts & prayers are with the victims & families regarding the senseless acts that took place." Kim Kardashian: "Just landed in Miami & heard the tragic news re the shooting in Aurora. This is so devastating & beyond ..."

Khloe Kardashian Odom: "My heart goes out to everyone who was affected by the shooting in Colorado early this morning. I'm praying for you ALL!"

Julianne Hough: "My love & prayers are with all the families that have been affected by the horrible, unspeakable torment from last nights shooting! My heart is so heavy! Don't take for granted the air we breath the people that touch us and the people we touch!"

Mitt Romney: "Ann and I are deeply saddened by the news of the senseless violence that took the lives of 15 people in Colorado and injured dozens more. We are praying for the families and loved ones of the victims during this time of deep shock and immense grief. We expect that the person responsible for this terrible crime will be quickly brought to justice."

Edward Norton: "These things are happening with disturbing frequency in our country. I send my sympathy and support to the families that are suffering."

Jeremy Renner: "It crushes my heart and my heart goes out to all the families. This will have nothing to do with how well movies do now at the box office - cinema is so small compared to what has just happened." Rachel Weisz: "I have incredible sympathy for the families who lost loved ones."

Simon Cowell: "My thoughts and condolences to the families and friends in Colorado."

Jim Carrey: "My love to the victims in Colorado. The kid ws sick bt u who can still support automatic weapon sales r the real maniacs in this country."